RESEARCH PAPERS: Boiling and Condensation

Flow Boiling in Horizontal Tubes: Part 2—New Heat Transfer Data for Five Refrigerants

[+] Author and Article Information
N. Kattan, J. R. Thome, D. Favrat

Laboratory for Industrial Energy Systems, Department of Mechanical Engineering, Swiss Federal Institute of Technology, CH-1015 Lausanne, Switzerland

J. Heat Transfer 120(1), 148-155 (Feb 01, 1998) (8 pages) doi:10.1115/1.2830038 History: Received October 01, 1996; Revised July 16, 1997; Online January 07, 2008


A summary of a comprehensive experimental study on flow boiling heat transfer is presented for five refrigerants (R134a, R123, R402A, R404A, and R502) evaporating inside plain, horizontal, copper tube test sections. The test data were obtained for both 12.00 mm and 10.92 mm diameters using hot water as the heating source. Besides confirming known trends in flow boiling heat transfer data as a function of test variables, it was also proven that the heat flux level at the dryout point at the top of the tube in annular flow has a very significant downstream effect on heat transfer coefficients in the annular flow regime with partial dryout.

Copyright © 1998 by The American Society of Mechanical Engineers
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